CN107294581A - Multi-antenna transmission, single antenna reception, multi-aerial transmission system and method - Google Patents
Multi-antenna transmission, single antenna reception, multi-aerial transmission system and method Download PDFInfo
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- CN107294581A CN107294581A CN201610192085.7A CN201610192085A CN107294581A CN 107294581 A CN107294581 A CN 107294581A CN 201610192085 A CN201610192085 A CN 201610192085A CN 107294581 A CN107294581 A CN 107294581A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 101
- 238000012795 verification Methods 0.000 claims abstract description 72
- 238000004891 communication Methods 0.000 claims abstract description 70
- 238000001514 detection method Methods 0.000 claims abstract description 44
- 230000001174 ascending effect Effects 0.000 claims abstract description 14
- 238000012163 sequencing technique Methods 0.000 claims abstract description 14
- 238000012937 correction Methods 0.000 claims description 12
- 238000012216 screening Methods 0.000 claims description 12
- 238000005194 fractionation Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 7
- 238000005562 fading Methods 0.000 abstract description 17
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000007689 inspection Methods 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000036244 malformation Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0652—Feedback error handling
- H04B7/0656—Feedback error handling at the transmitter, e.g. error detection at base station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0658—Feedback reduction
- H04B7/066—Combined feedback for a number of channels, e.g. over several subcarriers like in orthogonal frequency division multiplexing [OFDM]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
- H04B7/0854—Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
Abstract
The present invention provides a kind of multi-antenna transmission, single antenna reception, multi-aerial transmission system and method, and the multi-antenna transmission system includes：At least two antenna；At least two transmitter module；Packet to be launched is converted into wireless signal by each transmitter module；Protocol layer shunt, including：Detection unit is verified, detects whether packet to be sent has check bit, check bit is added if without check bit；Sequencing unit, sequence number position is added to the packet of the verification detection unit output；Output unit, sends corresponding packet to transmitter module described at least one according to the order of sequence number position and is launched successively.The problem of present invention can not only solve rapid fading, the communication stability of ascending communication system is also assures that simultaneously, multiband need not be taken, without interference with downlink communication system, the communication quality of multi-aerial transmission system is ensure that on the premise of reception antenna quantity is not increased.
Description
Technical field
The invention belongs to wireless communication technology field, it is related to a kind of wireless transmitting system and method, more particularly to a kind of multi-antenna transmission, single antenna reception, multi-aerial transmission system and method.
Background technology
All radio communications are all based on electromagnetic wave in the propagation in space to realize Information Communication.The propagation of electromagnetic wave in free space mainly has direct projection, reflection, scattering and 4 kinds of modes of diffraction, the result is that reflection, scattering, diffraction or the straightline propagation of signal Use barriers thing, receiving terminal is reached through mulitpath so that receive signal and some changes are generated compared with sending signal.Wireless channel mainly has transmission attenuation, frequency selective fading caused by multipath transmisstion, time selective fading caused by time variation and space selective fading caused by angle spread to the influence that signal is transmitted.
It is wirelessly transferred in the case where transmit power is certain, the transmission range of wireless signal is limited, and transmission range is longer, the anti fading performance of wireless transmitting system also can be poorer.Multi-antenna technology arises at the historic moment to improve radio communication quality.However, in city, barrier is more, the reception of wireless signal is often influenceed by rapid fading, i.e., at a time, signal is not received suddenly.
The content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of multi-antenna transmission, single antenna reception, multi-aerial transmission system and method, for solving the problem of existing wireless signal receiving system is easily influenceed by rapid fading.
In order to achieve the above objects and other related objects, the present invention provides a kind of multi-antenna transmission system, and the multi-antenna transmission system includes：At least two antenna；At least two transmitter module, each transmitter module is corresponded with an antenna to be connected；Packet to be launched is converted into wireless signal by each transmitter module；Protocol layer shunt, is connected with all transmitter modules, including：Detection unit is verified, detects whether packet to be sent has check bit, check bit is added if without check bit；Sequencing unit, is connected with the verification detection unit, and sequence number position is added to the packet of the verification detection unit output；Output unit, is connected with the sequencing unit, and sending corresponding packet to transmitter module described at least one successively according to the order of sequence number position is launched.
Alternatively, the output unit sends corresponding packet to transmitter module described at least two according to the order of sequence number position and launched successively.
Alternatively, the protocol layer shunt is the protocol layer shunt of time diversity；The time interval of transmitter module transmitting identical packet is less than 1s described in described at least one.
The present invention also provides a kind of single antenna reception system, and the single antenna reception system includes：Individual antenna；Receiving module, is connected with the individual antenna, and the wireless signal received is converted into packet；Whether screening module, is connected with the receiving module, judge the packet received success according to the sequence number of the packet received position, the packet is abandoned if having received successfully；The packet is transmitted to correction verification module if not receiving successfully；The correction verification module is connected with the screening module, carries out error checking to packet according to the check bit of packet, the packet by verification is regarded as receiving successfully, reception failure is regarded as to not validated packet.
The present invention also provides a kind of multi-aerial transmission system, and the multi-aerial transmission system includes：Ascending communication system；The ascending communication system includes multi-antenna transmission system and single antenna reception system；The ascending communication system is time diversity communication system.
Alternatively, the multi-aerial transmission system also includes：Downlink communication system；The downlink communication system includes single-antenna transmission system and multiple antennas reception system；The downlink communication system is space diversity communication system.
Alternatively, the single-antenna transmission system includes：Detection module is verified, detects whether packet to be sent has check bit, check bit is added if without check bit；Order module, is connected with the verification detection module, and sequence number position is added to the packet of the verification detection module output；Split module, it is connected with the verification detection module, one larger packet is split into several less packets, so that the verification detection module adds check bit to the packet after fractionation, and the order module adds sequence number position to the packet after fractionation.
Alternatively, the multiple antennas reception system includes：At least two antenna；At least two receiving module, each receiving module is corresponded with an antenna to be connected；The wireless signal received is converted into packet by each receiving module；Each packet includes check bit sum sequence number position；Protocol layer combiner, is connected with all receiving modules, including：Verification unit, error checking is carried out according to check bit to each packet；Combining unit, is connected with the verification unit, to merging processing, output merging data bag by verification and sequence number identical packet；Output unit, is connected with the combining unit, and corresponding merging data bag is sent successively according to the order of sequence number position；The protocol layer combiner is the protocol layer combiner of space diversity.
Alternatively, the multi-antenna transmission system includes：At least two antenna；At least two transmitter module, each transmitter module is corresponded with an antenna to be connected；Packet to be launched is converted into wireless signal by each transmitter module；Protocol layer shunt, is connected with all transmitter modules, including：Detection unit is verified, detects whether packet to be sent has check bit, check bit is added if without check bit；Sequencing unit, is connected with the verification detection unit, and sequence number position is added to the packet of the verification detection unit output；Output unit, is connected with the sequencing unit, and sending corresponding packet to transmitter module described at least one successively according to the order of sequence number position is launched；The protocol layer shunt is the protocol layer shunt of time diversity.
Alternatively, the single antenna reception system includes：Individual antenna；Receiving module, is connected with the individual antenna, and the wireless signal received is converted into packet；Whether screening module, is connected with the receiving module, judge the packet received success according to the sequence number of the packet received position, the packet is abandoned if having received successfully；The packet is transmitted to correction verification module if not receiving successfully；The correction verification module is connected with the screening module, carries out error checking to packet according to the check bit of packet, the packet by verification is regarded as receiving successfully, reception failure is regarded as to not validated packet.
The present invention also provides a kind of multi-antenna emission method, and the multi-antenna emission method includes：In protocol layer, detect whether packet to be sent has check bit, check bit is added if without check bit；To the packet addition sequence number position of the verification detection unit output；Corresponding packet is sent at least two transmitter module according to the order of sequence number position successively；Packet to be launched is converted into wireless signal using transmitter module；Launch the wireless signal using at least two antenna.
Alternatively, when sending corresponding packet successively according to the order of sequence number position and being launched at least two transmitter module, the time interval of at least two transmitter module transmitting identical packet is less than 1s.
Alternatively, the multi-antenna emission method is the protocol layer branch launching technique of time diversity.
The present invention also provides a kind of single antenna reception method, and the single antenna reception method includes：Wireless signal is received using individual antenna；The wireless signal received is converted into packet；Whether the packet received success is judged according to the sequence number of the packet received position, the packet is abandoned if having received successfully；Error checking is carried out to packet according to the check bit of packet if not receiving successfully, the packet by verification is regarded as receiving successfully, reception failure is regarded as to not validated packet.
The present invention also provides a kind of multi-antenna transmission method, and the multi-antenna transmission method includes：Downlink communication method and uplink communication method；The downlink communication method includes single-antenna transmission method and multi-antenna receiving method；The uplink communication method includes multi-antenna emission method and single antenna reception method；The downlink communication method is space diversity communication method；The uplink communication method is time diversity communication means.
Alternatively, the single-antenna transmission method includes：Whether detection packet to be sent has check bit, and check bit is added if without check bit；To launching behind the packet addition sequence number position with check bit.
Alternatively, the multi-antenna receiving method includes：Wireless signal is received using at least two antenna；The wireless signal received is converted into packet respectively using the receiving module being connected is corresponded with least two antenna；Each packet includes check bit sum sequence number position；In protocol layer, error checking is carried out to each packet according to check bit, abandoning can not be by verifying the packet of computing, to by verification and sequence number position identical packet merges processing, output merging data bag；And corresponding merging data bag is sent according to the order of sequence number position successively.
As described above, multi-antenna transmission, single antenna reception, multi-aerial transmission system and the method for the present invention, have the advantages that：
Multi-antenna transmission system of the present invention uses the protocol layer shunt of time diversity, one bag hair is multiple, the problem of can not only rapid fading being solved, the communication stability of ascending communication system is also assures that simultaneously, multiband need not be taken, without interference with downlink communication system, the communication quality of multi-aerial transmission system is ensure that on the premise of reception antenna quantity is not increased.
Brief description of the drawings
One kind that Fig. 1 a are shown as the multi-antenna transmission system described in the embodiment of the present invention realizes structural representation.
Fig. 1 b are shown as a kind of implementation process schematic diagram of the multi-antenna emission method described in the embodiment of the present invention.
One kind that Fig. 2 a are shown as the single antenna reception system described in the embodiment of the present invention realizes structural representation.
Fig. 2 b are shown as a kind of implementation process schematic diagram of the single antenna reception method described in the embodiment of the present invention.
One kind that Fig. 3 a are shown as the multi-aerial transmission system described in the embodiment of the present invention realizes structural representation.
One kind that Fig. 3 b are shown as the single-antenna transmission system described in the embodiment of the present invention realizes structural representation.
One kind that Fig. 3 c are shown as the multiple antennas reception system described in the embodiment of the present invention realizes structural representation.
One kind that Fig. 4 a are shown as the multi-antenna transmission method described in the embodiment of the present invention realizes schematic diagram of a scenario.
Fig. 4 b are shown as a kind of implementation process schematic diagram of the single-antenna transmission method described in the embodiment of the present invention.
Fig. 4 c are shown as another implementation process schematic diagram of the single-antenna transmission method described in the embodiment of the present invention.
Component label instructions
100 multi-antenna transmission systems
110 antennas
120 transmitter modules
130 protocol layer shunts
131 verification detection units
132 sequencing units
133 output units
200 single antenna reception systems
210 antennas
220 receiving modules
230 screening modules
240 correction verification modules
300 multi-aerial transmission systems
310 ascending communication systems
311 multi-antenna transmission systems
312 single antenna reception systems
320 downlink communication systems
321 single-antenna transmission systems
3211 verification detection modules
3212 order modules
3213 split module
322 multiple antennas reception systems
3221 antennas
3222 receiving modules
3223 protocol layer combiners
32231 verification units
32232 combining units
32233 output units
S101~S105 steps
S201~S203 steps
S401~S402 steps
S411~S413 steps
S421~S423 steps
Embodiment
Illustrate embodiments of the present invention below by way of specific instantiation, those skilled in the art can be understood other advantages and effect of the present invention easily as the content disclosed by this specification.The present invention can also be embodied or applied by other different embodiments, and without departing from the spirit of the present invention the various details in this specification can also carry out various modifications or alterations based on different viewpoints and application.It should be noted that, in the case where not conflicting, the feature in following examples and embodiment can be mutually combined.
It should be noted that, diagram provided in following examples only illustrates the basic conception of the present invention in a schematic way, then only display is drawn with relevant component in the present invention rather than according to component count, shape and the size during actual implement in schema, kenel, quantity and the ratio of each component can be a kind of random change during its actual implementation, and its assembly layout kenel may also be increasingly complex.
Fig. 1 a are referred to, the present invention provides a kind of multi-antenna transmission system 100, and the multi-antenna transmission system 100 includes：At least two antenna 110, at least two transmitter module 120, protocol layer shunt 130.
Each transmitter module 120 is corresponded with an antenna 110 to be connected；Packet to be launched is converted into wireless signal by each transmitter module 120.
The protocol layer shunt 130 is connected with all transmitter modules 120；The view layer shunt 130 includes：Verify detection unit 131, sequencing unit 132, output unit 133.
The verification detection unit 131 detects whether packet to be sent has check bit, and check bit is added if without check bit.Generally, the packet sent with agreements such as such as TCP/IP comes with check bit, now need not increase check bit；And when some packets of transmission do not possess check bit, the verification detection unit 131 can add check bit on legacy data package base, so that reception system verifies error rate of the packet in transmitting procedure, it is ensured that the accuracy of packet.
The sequencing unit 132 is connected with the verification detection unit 131, and sequence number position is added to the packet of the verification detection unit output.The purpose that the sequencing unit 132 sets sequence number position is that the data for making transmission are surrounded by number order, consequently facilitating reception system restores the content to be transmitted originally according to the number order of sequence number position.
The output unit 133 is connected with the sequencing unit 132, and sending corresponding packet to transmitter module described at least one successively according to the order of sequence number position is launched.That is, for same packet to be launched, the output unit can send the packet to be launched to 1 transmitter module, and the transmitter module is repeated several times and launches the packet to be launched, the problem of can so solving rapid fading.In addition, for same packet to be launched, the output unit can also send the packet to be launched to the transmitter module of more than 2, the transmitter module of more than 2 is launched the packet to be launched, the problem of so can also solving rapid fading respectively.Wherein, the time interval of transmitter module transmitting identical packet is less than necessary 1s.In the present embodiment, a bag hair is multiple, realizes time diversity, the problem of can solving rapid fading.
The present invention also provides a kind of multi-antenna emission method; the multi-antenna transmission system can realize multi-antenna emission method of the present invention; but multi-antenna emission method of the present invention realizes that device includes but is not limited to the structure for the multi-antenna transmission system that the present embodiment is enumerated; the malformation and replacement for the prior art that every principle according to the present invention is done, are included in protection scope of the present invention.
The step of protection domain of multi-antenna emission method of the present invention is not limited to the step execution sequence that the present embodiment is enumerated, the prior art that every principle according to the present invention is done increase and decrease, step are replaced realized scheme and are included in protection scope of the present invention.
Referring to shown in Fig. 1 b, the multi-antenna emission method includes：
S101, in protocol layer, detects whether packet to be sent has check bit, check bit is added if without check bit.Generally, the packet sent with agreements such as such as TCP/IP comes with check bit, now need not increase check bit；And when some packets of transmission do not possess check bit, check bit can be added on legacy data package base, so that reception system verifies error rate of the packet in transmitting procedure, it is ensured that the accuracy of packet.
S102, sequence number position is added to the packet of the verification detection unit output.The purpose for setting sequence number position is that the data for making transmission are surrounded by number order, consequently facilitating reception system restores the content to be transmitted originally according to the number order of sequence number position.
S103, corresponding packet is sent at least one transmitter module according to the order of sequence number position successively.That is, for same packet to be launched, the packet to be launched can be sent to 1 transmitter module, the transmitter module is repeated several times and launches the packet to be launched, the problem of can so solving rapid fading.In addition, for same packet to be launched, the packet to be launched being sent to the transmitter module of more than 2, the transmitter module of more than 2 is launched the packet to be launched, the problem of so can also solving rapid fading respectively.Wherein, the time interval of transmitter module transmitting identical packet is less than necessary 1s.Now the multi-antenna emission method is the protocol layer branch launching technique of time diversity.In the present embodiment, a bag hair is multiple, realizes time diversity, the problem of can solving rapid fading.
S104, wireless signal is converted into using transmitter module by packet to be launched.
S105, the wireless signal is launched using connected antenna corresponding with transmitter module.
The present invention also provides a kind of single antenna reception system, and referring to shown in Fig. 2 a, the single antenna reception system 200 includes：Individual antenna 210, receiving module 220, screening module 230, correction verification module 240.
The receiving module 220 is connected with the individual antenna 210, and the wireless signal received is converted into packet.
Whether the screening module 230 is connected with the receiving module 220, judge the packet received success according to the sequence number of the packet received position, the packet is abandoned if having received successfully；The packet is transmitted to correction verification module if not receiving successfully.Each packet includes check bit sum sequence number position.For example, one kind of packet realizes that form is：Former packet+check bit+sequence number position.The check bit is for verifying whether the packet malfunctions.The sequence number position is used to the serial number of giving out a contract for a project of packet, so that user can receive the reception content (i.e. the content of packet and sequence) with transmitting terminal transmission content (i.e. the content of packet and sequence) equally.
The correction verification module 240 is connected with the screening module 230, carries out error checking to packet according to the check bit of packet, the packet by verification is regarded as receiving successfully, reception failure is regarded as to not validated packet.Error checking is carried out to each packet according to check bit.When the check bit has 32 bit byte, the probability that the verification unit 331 does not detect packet error is 2-32, it is seen then that the probability that the present embodiment does not detect packet error is low-down, as a consequence it is hardly possible to which inspection does not measure packet error, ensures that the accuracy for issuing the packet of user yet.
The present invention also provides a kind of single antenna reception method; the single antenna reception system can realize single antenna reception method of the present invention; but single antenna reception method of the present invention realizes that device includes but is not limited to the structure for the single antenna reception system that the present embodiment is enumerated; the malformation and replacement for the prior art that every principle according to the present invention is done, are included in protection scope of the present invention.
The step of protection domain of single antenna reception method of the present invention is not limited to the step execution sequence that the present embodiment is enumerated, the prior art that every principle according to the present invention is done increase and decrease, step are replaced realized scheme and are included in protection scope of the present invention.
Referring to shown in Fig. 2 b, the single antenna reception method includes：
S201, wireless signal is received using individual antenna.
S202, packet is converted into by the wireless signal received.Each packet includes check bit sum sequence number position.For example, one kind of packet realizes that form is：Former packet+check bit+sequence number position.The check bit is for verifying whether the packet malfunctions.The sequence number position is used to the serial number of giving out a contract for a project of packet, so that user can receive the reception content (i.e. the content of packet and sequence) with transmitting terminal transmission content (i.e. the content of packet and sequence) equally.
Whether S203, judge the packet received success according to the sequence number of the packet received position, the packet abandoned if having received successfully；Error checking is carried out to packet according to the check bit of packet if not receiving successfully, the packet by verification is regarded as receiving successfully, reception failure is regarded as to not validated packet.Error checking is carried out to each packet according to check bit.When the check bit has 32 bit byte, the probability that the verification unit 331 does not detect packet error is 2-32, it is seen then that the probability that the present embodiment does not detect packet error is low-down, as a consequence it is hardly possible to which inspection does not measure packet error, ensures that the accuracy for issuing the packet of user yet.
The present embodiment also provides a kind of multi-aerial transmission system, and referring to shown in Fig. 3 a, the multi-aerial transmission system 300 includes：Ascending communication system 310 and downlink communication system 320；The ascending communication system 310 includes multi-antenna transmission system 311 and single antenna reception system 312.The downlink communication system 320 includes single-antenna transmission system 321 and multiple antennas reception system 322.Wherein, the structure of the multi-antenna transmission system 311 in the ascending communication system 310 in the multi-aerial transmission system 300 is referring to shown in Fig. 1 a, and the structure of single antenna reception system 312 is referring to shown in Fig. 2 a.
The present invention uses space diversity communication to the downlink communication system 320, accordingly, and the ascending communication system 310 is communicated using time diversity.The data volume that such a up-downgoing diversity communication matching way is suitable for downlink transfer is big, and the data volume of uplink is small (such as：Ground with it is aerial) communication environment.
Because the downlink of the multi-aerial transmission system has been sampled single-antenna transmission system, downlink reception employs multiple antennas reception system, then accordingly, and the uplink receiving of the multi-aerial transmission system is just stable without downlink reception.Asked to solve this, multi-antenna transmission system of the present invention uses the protocol layer shunt of time diversity.The ascending communication system of the multi-aerial transmission system need not thus occupy excessive frequency range by the way of the time-division.
Further, the structure of the single-antenna transmission system 321 in the downlink communication system 320 in the multi-aerial transmission system 300 is referring to shown in Fig. 3 b, including：Detection module 3211, order module 3212 are verified, or/and splits module 3213.
The verification detection module 3211 detects whether packet to be sent has check bit, and check bit is added if without check bit.Generally, the packet sent with agreements such as such as TCP/IP comes with check bit, now need not increase check bit；And when some packets of transmission do not possess check bit, the verification detection module 210 can add check bit on legacy data package base, so that reception system verifies error rate of the packet in transmitting procedure, it is ensured that the accuracy of packet.
The order module 3212 is connected with the verification detection module 3211, and sequence number position is added to the packet of the verification detection module output.The purpose that the order module sets sequence number position is that the data for making transmission are surrounded by number order, consequently facilitating reception system restores the content to be transmitted originally according to the number order of sequence number position.
The fractionation module 3213 is connected with the verification detection module 3212, one larger packet is split into several less packets, so that the verification detection module adds check bit to the packet (i.e. less packet) after fractionation, and the order module adds sequence number position to the packet (i.e. less packet) after fractionation.Whether one packet needs fractionation to carry out detection judgement according to actual conditions, and larger and less difference is also relative Repeat according to actual needs to determine.It is larger or less concrete numerical value that protection scope of the present invention, which is not limited to packet,.
Further, the structure of the multiple antennas reception system 322 in the downlink communication system 320 in the multi-aerial transmission system 300 is referring to shown in Fig. 3 c, including：At least two antenna 3221, at least two receiving module 3222, protocol layer combiner 3223.Each receiving module 3222 is corresponded with an antenna 3221 to be connected；The protocol layer combiner 32223 is connected with all receiving modules 3222.
The antenna 3221 is used to receive wireless signal.The distance (i.e. more than or equal to the distance of 1/4 wavelength) of at least 1/4 wavelength is spaced between each antenna 3221, the wavelength is the wavelength of the wireless signal.When the distance being spaced between two antennas is more than 1/4 wavelength, the signal content that two antennas are received is separate, mutually incoherent (not interfereing with each other).
The wireless signal received is converted into packet by each receiving module 3222；Each packet includes check bit sum sequence number position.For example, one kind of packet realizes that form is：Former packet+check bit+sequence number position.The check bit is for verifying whether the packet malfunctions.The sequence number position is used to the serial number of giving out a contract for a project of packet, so that user can receive the reception content (i.e. the content of packet and sequence) with transmitting terminal transmission content (i.e. the content of packet and sequence) equally, and it can ensure that user only receives once correct content, reception system is avoided to repeat to send same packet to user, it is possible to increase the experience of client.
The protocol layer combiner 3223 includes verification unit 32231, combining unit 32232, output unit 32233.The protocol layer combiner 330 can be realized by software, can also be realized by hardware circuits such as FPGA.
The verification unit 32231 carries out error checking according to check bit to each packet.When the check bit has 32 bit byte, the probability that the verification unit 331 does not detect packet error is 2-32, it is seen then that the probability that the present embodiment does not detect packet error is low-down, as a consequence it is hardly possible to which inspection does not measure packet error, ensures that the accuracy for issuing the packet of user yet.
The combining unit 32232 is connected with the verification unit 32231, and abandoning can not be by verifying the packet of computing, to by verification and sequence number position identical packet merges processing, output merging data bag.The signal strength for the packet that two antennas are received is inevitable different, the combining unit is to merge strong and weak different but content identical packet to obtain the stronger merging data bag of signal, allow users to clearly know the content in packet, the stronger merging data bag of synchronous signal can also be transmitted to farther distance.The signal intensity maximum of merging data bag described in the present embodiment can increase 3dB.
The output unit 32233 is connected with the combining unit 32232, and corresponding merging data bag is sent successively according to the order of sequence number position.For example：Assuming that antenna A successively receives 5 packets that sequence number position is 1,2,3,4,5, respectively packet A1, A2, A3, A4, A5；Antenna B also successively receives 5 packets that sequence number position is 1,2,3,4,5, respectively packet B1, B2, B3, B4, B5；So, when above-mentioned 10 packets are detected by the verification of the verification unit 331, the combining unit merges processing to above-mentioned packet, obtains 5 merging data bags, is respectively：Merging data bag 1=a1A1+b1B1；Merging data bag 2=a2A2+b2B2；Merging data bag 3=a3A3+b3B3；Merging data bag 4=a4A4+b4B4；Merging data bag 5=a5A5+b5B5；Wherein, a1, a2, a3, a4, a5, are antenna A weight coefficient, b1, b2, b3, b4, and b5 is antenna B weight coefficient, and above-mentioned weight coefficient can flexibly be set according to actual conditions, and the mode of weighting can also flexibly set change according to actual needs.The output unit can send merging data bag 1, merging data bag 2, merging data bag 3, merging data bag 4, merging data bag 5 to user successively according to the order of sequence number position.
Because being wirelessly transferred and there is multipath effect, there is rapid fading phenomenon (i.e. wireless signal suddenly disappears in a short time) in wireless receiving system.Multiple antennas reception system of the present invention solves the problems, such as the rapid fading of wireless receiving, it is ensured that receives the intensity and accuracy of signal, and then also improves the transmission range for receiving signal to a certain extent.
In addition, multiple antennas reception system of the present invention is realized on the basis of the hardware configuration of existing wireless receiving system, and the hardware configuration without changing existing wireless receiving system, popularization, which is implemented, in actual applications is more prone to.
The present invention also provides a kind of multi-antenna transmission method; the multi-aerial transmission system can realize multi-antenna transmission method of the present invention; but multi-antenna transmission method of the present invention realizes that device includes but is not limited to the structure for the multi-aerial transmission system that the present embodiment is enumerated; the malformation and replacement for the prior art that every principle according to the present invention is done, are included in protection scope of the present invention.
The step of protection domain of multi-antenna transmission method of the present invention is not limited to the step execution sequence that the present embodiment is enumerated, the prior art that every principle according to the present invention is done increase and decrease, step are replaced realized scheme and are included in protection scope of the present invention.
The multi-antenna transmission method includes：Downlink communication method and uplink communication method；The downlink communication method includes single-antenna transmission method and multi-antenna receiving method；The uplink communication method includes multi-antenna emission method and single antenna reception method；The downlink communication method is space diversity communication method；The uplink communication method is time diversity communication means.
A kind of implementation process of the multi-antenna emission method is referring to shown in Fig. 1 b.A kind of implementation process of the single antenna reception method is referring to shown in Fig. 2 b.
A kind of implementation process of the single-antenna transmission method referring to shown in Fig. 4 a, including：
S401, detects whether packet to be sent has check bit, and check bit is added if without check bit.Generally, the packet sent with agreements such as such as TCP/IP comes with check bit, now need not increase check bit；And when some packets of transmission do not possess check bit, check bit can be added on legacy data package base, so that reception system verifies error rate of the packet in transmitting procedure, it is ensured that the accuracy of packet.
S402, launches after sequence number position is added to the packet with check bit.The purpose for setting sequence number position is that the data for making transmission are surrounded by number order, consequently facilitating reception system restores the content to be transmitted originally according to the number order of sequence number position.
Referring to shown in Fig. 4 b, another implementation of the single-antenna transmission method includes：
S411, several less packets are split into by larger packet.
S412, check bit is added to the less packet after fractionation.
S413, adds sequence number position to the less packet after fractionation, then launches again after addition check bit.
A kind of implementation process of the multi-antenna receiving method referring to shown in Fig. 4 c, including：
S421, wireless signal is received using at least two antenna.The distance (i.e. more than or equal to the distance of 1/4 wavelength) of at least 1/4 wavelength is spaced between each antenna, the wavelength is the wavelength of the wireless signal.When the distance being spaced between two antennas is more than 1/4 wavelength, the signal content that two antennas are received is separate, mutually incoherent (not interfereing with each other).
S422, packet is converted into using the receiving module being connected is corresponded with least two antenna by the wireless signal received respectively；Each packet includes check bit sum sequence number position.For example, one kind of packet realizes that form is：Former packet+check bit+sequence number position.The check bit is for verifying whether the packet malfunctions.The sequence number position is used to the serial number of giving out a contract for a project of packet, so that user can receive the reception content (i.e. the content of packet and sequence) with transmitting terminal transmission content (i.e. the content of packet and sequence) equally, and it can ensure that user only receives once correct content, reception system is avoided to repeat to send same packet to user, it is possible to increase the experience of client.
S423, in protocol layer, error checking is carried out according to check bit to each packet, to merging processing, output merging data bag by verification and sequence number identical packet；And corresponding merging data bag is sent according to the order of sequence number position successively.When the check bit has 32 bit byte, the probability that the verification unit 331 does not detect packet error is 2-32, it is seen then that the probability that the present embodiment does not detect packet error is low-down, as a consequence it is hardly possible to which inspection does not measure packet error, ensures that the accuracy for issuing the packet of user yet.The signal strength for the packet that two antennas are received is inevitable different, the present embodiment is to be weighted merging to obtain the stronger merging data bag of signal by strong and weak different but content identical packet, allow users to clearly know the content in packet, the stronger merging data bag of synchronous signal can also be transmitted to farther distance.The signal intensity maximum of merging data bag described in the present embodiment can increase 3dB.
Multi-antenna transmission system of the present invention uses the protocol layer shunt of time diversity, one bag hair is multiple, the problem of can not only rapid fading being solved, the communication stability of ascending communication system is also assures that simultaneously, multiband need not be taken, without interference with downlink communication system, the communication quality of multi-aerial transmission system is ensure that on the premise of reception antenna quantity is not increased.
In summary, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.Any person skilled in the art all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Therefore, those of ordinary skill in the art, without departing from disclosed spirit and all equivalent modifications completed under technological thought or change, should be covered by the claim of the present invention such as.
Claims (17)
1. a kind of multi-antenna transmission system, it is characterised in that the multi-antenna transmission system includes：
At least two antenna；
At least two transmitter module, each transmitter module is corresponded with an antenna to be connected；Each transmitter module will be to be launched
Packet be converted into wireless signal；
Protocol layer shunt, is connected with all transmitter modules, including：
Detection unit is verified, detects whether packet to be sent has check bit, check bit is added if without check bit；
Sequencing unit, is connected with the verification detection unit, and sequence number position is added to the packet of the verification detection unit output；
Output unit, is connected with the sequencing unit, and corresponding packet is sent successively at least 1 according to the order of sequence number position
The individual transmitter module is launched.
2. multi-antenna transmission system according to claim 1, it is characterised in that：The output unit according to sequence number position order according to
Secondary corresponding packet to the transmitter module described at least two that sends is launched.
3. multi-antenna transmission system according to claim 1, it is characterised in that：The protocol layer shunt is the association of time diversity
Discuss layer shunt；The time interval of transmitter module transmitting identical packet is less than 1s described in described at least one.
4. a kind of single antenna reception system, it is characterised in that the single antenna reception system includes：
Individual antenna；
Receiving module, is connected with the individual antenna, and the wireless signal received is converted into packet；
Whether screening module, is connected with the receiving module, judge the packet according to the sequence number of the packet received position
Received success, abandons the packet if having received successfully；The packet is transmitted to correction verification module if not receiving successfully；
The correction verification module is connected with the screening module, and error checking is carried out to packet according to the check bit of packet, right
Regard as receiving successfully by the packet of verification, reception failure is regarded as to not validated packet.
5. a kind of multi-aerial transmission system, it is characterised in that the multi-aerial transmission system includes：Ascending communication system；It is described up
Communication system includes multi-antenna transmission system and single antenna reception system；The ascending communication system is time diversity communication system
System.
6. multi-aerial transmission system according to claim 5, it is characterised in that the multi-aerial transmission system also includes：It is descending
Communication system；The downlink communication system includes single-antenna transmission system and multiple antennas reception system；The downlink communication system
For space diversity communication system.
7. multi-aerial transmission system according to claim 6, it is characterised in that the single-antenna transmission system includes：
Detection module is verified, detects whether packet to be sent has check bit, check bit is added if without check bit；
Order module, is connected with the verification detection module, and sequence number position is added to the packet of the verification detection module output；
Module is split, is connected with the verification detection module, a larger packet is split into several less data
Bag, so that the verification detection module adds check bit to the packet after fractionation, and after the order module is to fractionation
Packet addition sequence number position.
8. multi-aerial transmission system according to claim 6, it is characterised in that the multiple antennas reception system includes：
At least two antenna；
At least two receiving module, each receiving module is corresponded with an antenna to be connected；Each receiving module will be received
Wireless signal be converted into packet；Each packet includes check bit sum sequence number position；
Protocol layer combiner, is connected with all receiving modules, including：
Verification unit, error checking is carried out according to check bit to each packet；
Combining unit, is connected with the verification unit, to by verification and sequence number position identical packet merge processing,
Export merging data bag；
Output unit, is connected with the combining unit, and corresponding merging data bag is sent successively according to the order of sequence number position；Institute
State the protocol layer combiner that protocol layer combiner is space diversity.
9. multi-aerial transmission system according to claim 5, it is characterised in that the multi-antenna transmission system includes：
At least two antenna；
At least two transmitter module, each transmitter module is corresponded with an antenna to be connected；Each transmitter module will be to be launched
Packet be converted into wireless signal；
Protocol layer shunt, is connected with all transmitter modules, including：
Detection unit is verified, detects whether packet to be sent has check bit, check bit is added if without check bit；
Sequencing unit, is connected with the verification detection unit, and sequence number position is added to the packet of the verification detection unit output；
Output unit, is connected with the sequencing unit, and corresponding packet is sent successively at least 1 according to the order of sequence number position
The individual transmitter module is launched；The protocol layer shunt is the protocol layer shunt of time diversity.
10. multi-aerial transmission system according to claim 5, it is characterised in that the single antenna reception system includes：
Individual antenna；
Receiving module, is connected with the individual antenna, and the wireless signal received is converted into packet；
Whether screening module, is connected with the receiving module, judge the packet according to the sequence number of the packet received position
Received success, abandons the packet if having received successfully；The packet is transmitted to correction verification module if not receiving successfully；
The correction verification module is connected with the screening module, and error checking is carried out to packet according to the check bit of packet, right
Regard as receiving successfully by the packet of verification, reception failure is regarded as to not validated packet.
11. a kind of multi-antenna emission method, it is characterised in that the multi-antenna emission method includes：
In protocol layer, detect whether packet to be sent has check bit, check bit is added if without check bit；
To the packet addition sequence number position of the verification detection unit output；
Corresponding packet is sent at least two transmitter module according to the order of sequence number position successively；
Packet to be launched is converted into wireless signal using transmitter module；
Launch the wireless signal using at least two antenna.
12. multi-antenna transmission method according to claim 11, it is characterised in that：Sent successively pair when according to the order of sequence number position
When the packet answered at least two transmitter module is launched, at least two transmitter module transmitting identical packet
Time interval is less than 1s.
13. multi-antenna transmission method according to claim 11, it is characterised in that：The multi-antenna emission method is time diversity
Protocol layer branch launching technique.
14. a kind of single antenna reception method, it is characterised in that the single antenna reception method includes：
Wireless signal is received using individual antenna；
The wireless signal received is converted into packet；
Whether the packet received success is judged according to the sequence number of the packet received position, is abandoned if having received successfully
The packet；Error checking is carried out to packet according to the check bit of packet if not receiving successfully, to the number by verification
Regard as receiving successfully according to bag, reception failure is regarded as to not validated packet.
15. a kind of multi-antenna transmission method, it is characterised in that the multi-antenna transmission method includes：Downlink communication method and uplink communication
Method；The downlink communication method includes single-antenna transmission method and multi-antenna receiving method；The uplink communication method includes
Multi-antenna emission method and single antenna reception method；The downlink communication method is space diversity communication method；It is described up logical
Letter method is time diversity communication means.
16. multi-aerial transmission system according to claim 15, it is characterised in that the single-antenna transmission method includes：
Whether detection packet to be sent has check bit, and check bit is added if without check bit；
To launching behind the packet addition sequence number position with check bit.
17. multi-aerial transmission system according to claim 15, it is characterised in that the multi-antenna receiving method includes：
Wireless signal is received using at least two antenna；
The wireless signal received is converted into respectively using the receiving module being connected is corresponded with least two antenna
Packet；Each packet includes check bit sum sequence number position；
In protocol layer, error checking is carried out to each packet according to check bit, abandon can not by verifying the packet of computing,
To merging processing, output merging data bag by verification and sequence number identical packet；And according to the order of sequence number position
Corresponding merging data bag is sent successively.
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